@book{54013,
	author = {Greuel, Gert-Martin and Pfister, Gerhard},
	title = {A Singular introduction to commutative algebra /},
	publisher = {Springer,},
	year = {c2008},
	address = {Berlin ;},
	edition = {2nd, extended ed.},
	url = {http://www.loc.gov/catdir/toc/fy0803/2007936410.html}
}